JPS59156783A - Serial dot printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a serial dot printer, and more particularly to a serial dot printer (hereinafter simply referred to as a "printer") that is capable of preventing local wear of a positioning head and preventing deterioration of print quality.
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[Prior art]

FIG. 1 shows a schematic configuration of a wire dot printer as an example of a conventional printer. In the figure, 1 is a code analysis section, 2 is a ruled line print position setting section, 3 is a line feed control section, 5 is a dot pattern generation section, 6 is a wire dot print head, and 7 is a dot pattern generation section.
8 is a platen, 8 is a paper feed mechanism, and 9 is paper. The code analysis section 1 is, for example, a decoder, and analyzes the print code and control code received from the host device, and in the case of a print code, activates the dot pattern generation section δ and causes the print head 6 to print. If the code analyzed by the code analysis unit 1 is a code that controls the printing of ruled lines, the ruled line print position setting unit 2 sets the printing start position and end position in one line of the ruled line according to the control code. It consists of a storage means. Further, the line feed control unit 3 is composed of a control unit that controls the line feed operation according to the line feed pitch according to the control code when the code analyzed by the code analysis unit l is a control code for controlling a line feed. There is.

In the conventional printer configured as described above, when the code analysis section 1 detects a ruled line printing code, the ruled line printing position setting section 2 determines the printed position of the ruled line, the printed position of the ruled line, and the length of the ruled line, and sets a line break. The control section 3 is activated to feed the paper 9 by the paper feed mechanism 8, and line breaks are performed at a constant line feed pitch. On the other hand, the dot pattern generating section 5
A fixed dot pattern of ruled i printing corresponding to the length of the ruled line is outputted to the print head 6 while the line is being printed, and all ruled line printing is performed.

If (z 1
This is an example of the case of printing te ruled line 12E, and the position 11 is line-feeded by a constant line-feed pitch n with respect to the wire dot &l position 1° (indicated by a circle) when printing an ode. (Similarly indicated by a circle) indicates a situation in which a fixed dot pattern is printed.

When performing ruled line printing as described above, a specific wire dot (1 in the example in Figure 2) is always used, so this wire dot is the only one that is used frequently and wears out quickly. There has been a problem in that the quality of the characters printed is degraded. This problem is a particularly serious problem in printers other than wire dot printers, especially in devices that handle many tabular documents. It is an object of the present invention to provide a printer that eliminates the above-mentioned problems with conventional printers, prevents wear of specific printing elements of a print head, and prevents deterioration of print quality.

[Summary of the invention]

The gist of the present invention is that the pitch of line feeds performed in order to print one character on a ruled line in a printer is sequentially changed so that the position of a dot used in ruled line printing is not fixed.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 3 shows a schematic configuration of a wire dot printer which is an embodiment of the present invention. In the mouth, symbols 1-3
and 5 to 9 indicate the same components as shown in Figure 1 of Collection,
This section is a wire dot management section (hereinafter simply referred to as "wire dot management section") for ruled line printing. The wire dot management subcommittee includes a ruled line printing position storage unit that stores the ruled line printing position in the line feed direction, and a wire dot setting unit that sets the wire dots used for sparse ruled printing to move sequentially every time a ruled line is opened for one space. and an arithmetic unit that calculates line feed pinch from the ruled line print position ff/information from the ruled line print position storage unit and the wire dot information to be used from the wire dot setting unit.

In the apparatus of this embodiment configured as described above, when the food analysis section 1 detects the line printing code, the ruled line printing position setting section 2 determines the printing position of the ruled line, and the wire dot management section 4 is activated. The wire dot management section 4 activates the line feed control section 3 so that the wire dot for printing the ruled line comes to the above-mentioned ruled line printing position. For example, as shown in FIG. 4, the wire dot management section 4 stores the line feed pitch n from the upper end of the character in the previous line to the ruled line printing position together with the ruled line printing position, and The value (n-1, n
-2, . . . ) may be set as the number of pinches for activating the line feed control unit 3. In this case, the wire dots used for ruled line printing may be used as information for activating the dot pattern generating section 5.

The line feed control unit 3 uses the paper feed mechanism 8 to feed the paper 9 by a line feed pitch corresponding to the wire driver (A) used for ruled line printing. On the other hand, a dot pattern corresponding to the wire dots used for ruled line printing is output from the dot pattern generating section δ to the print head 6 in accordance with the length of the ruled line, and ruled line printing is performed. After the line feed is completed, the line feed to the next character printing position is determined by adding the wire dots used for the line feed pitch to the line feed pitch (m+1.m+2.・) corresponding to the line feed for the line print. ).

Figure 4 shows the above situation in detail. In this example, each time a ruled line is printed, the line feed pitch is shifted one dot at a time in the direction of decreasing the line feed pitch relative to the character printing position, and the dots used to print the ruled line are also shifted downward one by one. It is shifted as if it is used. In addition, in Figure 4, 1
1', 11 indicate the position of AI after the line break.

According to this embodiment, since the wire dots used for ruled line printing are not fixed to a specific thing, local wear and tear of the print head does not occur, and deterioration in print quality can be prevented.

In the above embodiment, the wire dots used for ruled line printing are shifted one by one so that the lower one is used, but the invention is not limited to this.

Further, in the above embodiment, an example in which the present invention is applied to a wired printer is shown, but the idea of the present invention can be applied to other
Needless to say, the present invention can also be applied to a one-sided printer. Furthermore, in a printer configured separately from a control device, the present invention can achieve the same effect when applied to the control device, and it goes without saying that such a configuration is not excluded. .

〔Effect of the invention〕

As described above, according to the present invention, the pitch of line feeds performed to perform ruled line printing in a printer is not fixed, so that local wear and tear of the print head can be prevented and deterioration of print quality can be prevented. This has the remarkable effect of making it possible to realize a printer with a high degree of accuracy.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of a conventional printer, FIG. 2 is a diagram showing a ruled line printing situation by the same printer, FIG. 3 is a diagram showing a schematic configuration of a printer that is an embodiment of the present invention, and FIG. FIG. 4 is a diagram showing how the printer prints ruled lines. 1: code analysis section, 2: ruled line print position setting section, 3: line feed control section, 4: wire dot management section, 5: dot pattern generation section, 6: print head, 7: platen, 8: paper feeding mechanism, 9: Paper. Figure 1 Figure 3

Claims (1)

[Claims] In a serial dot printer, when a code analysis unit detects a ruled line printing code, the printed position and length of the ruled line are set, the line feed control unit is activated, and a line feed is performed by the paper feed mechanism, information on the ruled line printing position; A serial dot printer characterized in that it has a calculation unit that calculates a line feed pitch from information on the position of dots on a print head, and changes the position of dots on a print head that prints ruled lines.